General Patton said “If everyone is thinking alike, then somebody isn’t thinking“. He was probably weary of GroupThink.
In any case I tend to agree: if there is too much agreement on something not trivial, something is wrong. We don’t have the right people in the room or they feel compelled to agree with the majority’s view.
I like to be the one offering a different approach or opinion. I know it takes guts to tell a high powered executive that has obviously flawed plans what people don’t dare tell him straight. It’s risky in some organizations. Maybe that’s why I became an independent consultant.
But remember: if people agree too easily on a controversial subject, something’s wrong in the organization.